Speed : distance travelled
_____________
time taken
The other formula and equations:
distance travelled = speed x time taken 'or' time taken = distance travelled
_____________
speed
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Distance- time graphs
A distance - time graph is a good way of showing how something moves.
- Gradient or slopes give speed.
- Straight line mean constant speed.
- A steep line means a lot of distance is being covered in a short time.
- A gradual line means a short distance is being covered in a long period.
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| Example of distance-time graphs |
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Acceleration
Acceleration is the rate at which an object changes it's velocity.
Acceleration: change in velocity
_______________
change in time
units of acceleration: ( m/s2)
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Velocity-time graph
- Gradient or slopes tell us the object acceleration / deceleration.
- Slope of velocity-time graph shows how quickly a velocity of object is changing.
- Straight lines mean constant acceleration.
- Area under the graph gives distance travelled.
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| Example of velocity-time graph The area under the graph is the distance that object has covered. |
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